A new approach for trace analysis of guanidine compounds in surface water with resorcinarene-based ion chromatography columns

The Analyst ◽  
2016 ◽  
Vol 141 (3) ◽  
pp. 939-946 ◽  
Author(s):  
Tayyebeh Panahi ◽  
Douglas J. Weaver ◽  
John D. Lamb ◽  
Roger G. Harrison
Keyword(s):  
Surface Water ◽  
Stationary Phase ◽  
Glutamic Acid ◽  
Ion Chromatography ◽  
Trace Analysis ◽  
Macroporous Resin ◽  
New Approach ◽  
Chromatography Columns ◽  
New Stationary Phase

New stationary phase materials based on glutamic acid functionalized resorcinarenes bound to divinylbenzene macroporous resin are used to separate guanidine contaminants in surface water.

Iodide analysis by ion chromatography on a new stationary phase of polystyrene-divinylbenzene agglomerated with polymerized-epichlorohydrin-dimethylamine

2015 ◽  
Vol 26 (8) ◽  
pp. 1026-1030 ◽  
Author(s):  
Mu-Hua Wang ◽  
Zhong-Ping Huang ◽  
Jun-Wei Liu ◽  
Jie He ◽  
Jia-Jie Zhang ◽  
...  
Keyword(s):  
Stationary Phase ◽  
Ion Chromatography ◽  
New Stationary Phase

A phenylenediamine-based carbon dot-modified silica stationary phase for hydrophilic interaction chromatography

The Analyst ◽  
2020 ◽  
Vol 145 (3) ◽  
pp. 1056-1061 ◽  
Author(s):  
Yali Yang ◽  
Haijuan Zhang ◽  
Jia Chen ◽  
Zhan Li ◽  
Liang Zhao ◽  
...  
Keyword(s):  
Stationary Phase ◽  
Carbon Dots ◽  
Porous Silica ◽  
Hydrophilic Interaction Chromatography ◽  
Silica Spheres ◽  
Hydrophilic Interaction ◽  
Modified Silica ◽  
Carbon Dot ◽  
New Stationary Phase ◽  
Enhanced Selectivity

Red emitting carbon dots derived from p-phenylenediamine were successfully grafted onto the surface of porous silica spheres which served as a new stationary phase for hydrophilic interaction chromatography with enhanced selectivity.

A New Stationary Phase for Capillary Gas Chromatography: Calix[4]resorcinarene Functionalized with Imidazolium Cationic Units

2021 ◽  
Vol 84 (4) ◽  
pp. 325-333
Author(s):  
Xiaomin Shuai ◽  
Zhiqiang Cai ◽  
Xinyu Zhao ◽  
Yujie Chen ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Stationary Phase ◽  
Capillary Gas Chromatography ◽  
New Stationary Phase

scholarly journals Simultaneous determination of clobutinol hydrochloride and doxylamine succinate from syrups by RP HPLC using a new stationary phase containing embedded urea polar groups

2012 ◽  
Vol 48 (2) ◽  
pp. 315-323 ◽  
Author(s):  
Paulo Cesar Pires Rosa ◽  
Isabel Cristina Sales Fontes Jardim
Keyword(s):  
Stationary Phase ◽  
Simultaneous Determination ◽  
Reversed Phase ◽  
Hplc Method ◽  
Array Detector ◽  
Polar Groups ◽  
Ich Guidelines ◽  
Relative Standard ◽  
New Stationary Phase

A new, simple, fast, reproducible and sensitive reversed phase HPLC method, using a new stationary phase containing embedded urea polar groups, has been developed and validated for the simultaneous determination of clobutinol hydrochloride (CLO) and doxylamine succinate (DOX) in syrups. The determination was carried out on a C8 urea column (125 mm x 3.9 mm i.d., 5 µm particle size) synthetized at the Liquid Chomatography Laboratory (LabCrom) of the Chemistry Institute of Unicamp. The mobile phase consisted of a mixture of acetonitrile:methanol:phosphate buffer (pH 2.5) in the gradient mode. The diode array detector (DAD) was operated at 230 nm for CLO and 262 nm for DOX. The method showed adequate precision, with relative standard deviations (RSD) less than 1%. The presence of the excipients did not interfere in the results of the analysis. Accuracy was determined by adding standards of the drugs to a placebo and good recovery values were obtained. The analytical curves were linear (r² 0.9999 for CLO and 0.9998 for DOX) over a wide concentration range (2.4-336 µg mL-1 for CLO and 2.3-63 µg mL-1 for DOX). The solutions were stable for at least 72 hours at room temperature. The criteria for validation using the ICH guidelines were fulfilled.

Enantioselective Gas Chromatographic Separation of Racemic N-alkylated Barbiturates: Application of C11-Chirasil-Dex as Chiral Stationary Phase in GC

2007 ◽  
Vol 2 ◽  
pp. 117739010700200
Author(s):  
Ashraf Ghanem
Keyword(s):  
Gas Chromatography ◽  
Stationary Phase ◽  
Chromatographic Separation ◽  
Chiral Stationary Phase ◽  
Enantiomeric Separation ◽  
Enantioselective Gas Chromatography ◽  
Gas Chromatographic Separation ◽  
New Stationary Phase

Chirasil-β-Dex containing an undecamethylene spacer (C11-Chirasil-Dex) was synthesized and used as chiral stationary phase (CSP) in enantioselective gas chromatography (GC). The versatility of the new stationary phase in the simultaneous enantiomeric separation of a set of N-alkylated barbiturates is demonstrated.

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